Cable connecter



June 23, 1925. 1,543,213 A. T. KVARNSTROM CABLE CONNECTER Filed may 12, 1923 IN V EN TOR.

/ By Alma-w T/(mmysrmm fljwfi 2, 164/4 ATTORNEY.

- panying drawings,- which torm a part of Patented June I UN TE -STATE xvanusraou; or

- To-all whom may concern.-

} 1543,213' PATENTOFFICE.

nnmorr, moment; Ass xenon. an amine sonoxon,

or nn'raon', moment.

cairn connnornn a u'eau' n meld an IL ms. f mm no; cause.

' '.Be it known that 'I, A rnno' men, a citizen of the United States, l6Sl(l-- ing at Detroit, county ofQWayne, Stateof Michigan, have invented a certain new and and useful Im rovenient in Cable Con- My invention relates te cable connectors tojbe used for removably' securing an aloe-- tric cable to an-outletbox or other-similar article.

The object of my-invention "is-to -provide asimple, inex nsive cable connecterof'the class descrijf which"is capable of remov-' able attachmentto the end ofan" electric 'cable, with novel improved means for dey tachably engaging the connecter'to an outlet box or other similar article to which itis desired to" secure the cable, and-a meritorious important *feature of my invention-is the a provision of means operable to Be held in engagement with the outlet box to secure the connecter thereto by the'cablerwhich carries the-connecter. v

Another .object s to provide a cable con- Knectelr' having a'tub'ular body member capable of receiving the end of the cable and "bein I vwhic body member is provided with movsecurely fastenedabout the cable,

able partsiadapted to-be thrust outwardly to engage the 'wall of an outlet box or other device upon theinsertionof the cable in the body member, such parts adapted to be held outwardly bythe cable and operable to be disengaged from such outlet box to permit detachment of the connecter upon withdrawal of the cable relative the connecter.

As appears in the speeificillustrative embodiment of my invention here shown and described, an important object is to form such a connecter of sheet metal with a body member to receive the end of the cable and besecurely fastened thereabout and having wall portions adapted to be constricted radially to permit insertion of the end of the connecter into an aperture in the wall of an outlet box, which wall portions are operable to be thrust outwardly to engage the end of my improved connecter insert such outletbox wall and be held in such outw wardly thrust position b the cable tofwhich the connecter isiattach In the drawings,-

Figure-1 is a sectional view through an outlet box to which a cable isattached by means of myconnecter.

Fig. 2'is a' similar sectional view showin in the aperture in the outlet box with'the cable'removed. J T I closure'for the 'connecterj body;,

Fig. 4-'s ."a' perspective 'of thefconne ctery; with s t v e member Fig. 3 is' a persp tive of the annularend .Fig. "5 is are tn the. linejo- -b,

Fi' 2. v *fn the particular embodiment of my in- 1' vention 'herein shown for illustrative purposes, the connectercomprises a sheet metal body member 10' which is preferably of reduced diameter at one end to fit snugly about anarmored cable' ll.

The wall of the body member; at such end is bent outwardly to form .ears 12 which are provided th threaded apertures 13 to receive a clamping screw 14. The tubular body is compressible and through the instrumentality of the-screw 14 it is possible to clamp the body of the connecter tightly about the cable to releasably' secure the connecter thereto.

The opposite end of the body member is of increased diameter and is receivable within an aperture such as 16 formed in the wall of an outlet box'or other similar article 17;

Shoulders 18 are punched up out of the wall of the body member to form stops which limit the insertion of the end of the body member through the aperture 16 in the wall of the outlet box so that the end of I the body member projects slightly beyond 'ly adjacent the closed end thereof to provide wall portions 23, the ends nf which wall portions adjacent thefhlosed'end of the body member are turned"o utwardly as at 24: These wall portionsare 'prefer'abl 'normallycompresscd so that their outwar ly turned ends do not extend beyond the ,wall of the body member but the wall porthat the turned-over ends do extend beyond the wall of the body'member'and held in such outwardly th'rust osition by the cable disposedgwithinfthe b0 yfmemberwhen the cable is inserted 'in{ the body member to such an extent as to"fo rc'e-L th esc .wall portions outwa rdly. After the'end'of the body member, has been inserted into the apere bdx is very slight, thereby taking up a minititre in"the"outlet"box;,it will be'secn that the turned-ovcr ends' ofjthese wall portions will engagethef inner fsurface oi the wall of theoiitlet boiwhe'n th'rustioutivardly, thereby" clamping the"connccter'thereto. The

wall

of the box, adjacent fjthe aperture turauglf which; @561 cpnnecter' extends .is

clamped between" ,th boulders 18 of the body ininber andfltheYturned-over ends of the exgnisiblewan portions; It will. be notedt at these outward ly bent ends'of the ek'pansible 'i valliportions are 'bent outwardly 'at-ahslight angle so :as to grip closely,' the wane:cueig tiecipeig 2 i'lt l will falso fap ear lthat the extension of theconneetehb yfiihteriorlyfof the outlet mum'fof space withi'ii'the box g In order t0.,relea se,the conneeter from the o itletibox all' that is necessary is to firstremove thegcableiupon the removal of which the wall portions 22 may be depressed inwardlyso that theiroutwardly bent ends clear the margin of the aperture in the outlet box and permit the removal of the connecte r.

of t tions are adapted to be thrust outwardly so '1. ..The' combination iwii'll ihiiving an aperture .to receive .thirethrougli. a cable 4:;

a tubular sheet-metal connector received the openings in the"body"o,the .gonnectei 60 formed 2 by thepunching; therefrom segue;

said-shoulders; gi lv y .2. ,'The .combinatioii Qwith, "allf,meinbei be received through said aperture saidgable;v o5

provided with a conductor extending; there:

3. it) tubular sheet. 'mctalpconnecter, lreoeiYed-oreig.

the end of the cable so'that'the cable. ijrL tends ..theret hrough,( said connector; having 70 one end snuglysecured"tol.the. cable" aridthe' ev i' QP 'ng Z I QlFLQ 'eZ wa l. thereof and an annular end elem ire for the; enlarged endfiof the connectetapertured 7 to be receivedoyer that portion ofthe conductor that projects beyond-;=the..end ofthe cable, said end closure havingresilient fingers extending into the connecter and engagmg in the openings through the-wall there-, 80 of to secure the end closure thereto.

In testimony whereof,-I sign this specification. a v

T.- KVARNSTROM. 

